UMI Performance 1978-1988 GM G-Body Handling Package, 2 Lowering- Stage 3

Part Number: UMIGBF003-2-B

UMI Performance 1978-1988 GM G-Body Handling Package, 2 Lowering- Stage 3

Part Number: UMIGBF003-2-B

$3,469.95

In Stock

( Inventory updated: 06/06/2026 )

Estimated ship date: 2-3 business days

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1978-1988 GM G-Body Handling Package, 2 Lowering- Stage 3

  • 1978-1988 GM G-Body Handling Package, 2 Lowering- Stage 3
  • #3000 – Replacement rear end housing bushings.
  • #3001 – Rear control arm Grade 8 hardware kit.
  • #3013 – Front upper & lower Grade 8 hardware kit.
  • #3028 – Tubular frame braces with hardware.
  • #3032 – Tubular lower front a-arms with Delrin bushings.
  • #3033-2 – Tubular upper front a-arms with Delrin bushings & ?? taller ball joints.
  • #3034 – Solid 1? heat treated rear sway bar.
  • #3035 – Heavy duty 1-1/4? front sway bar with new bushings & endlinks.
  • #3037 – Adjustable rear upper control arms with Roto-Joints.
  • #3038 – Tubular rear lower control arms with Roto-Joint.
  • #3051- 2 lowering springs, 600lb/in front and 130lb/in rear.
  • #S41030- UMI monotube shocks, designed & tuned for optimum ride quality combined and performance.
  • 1.250? front sway bar for flat cornering, CNC bent from 4140 balanced with 1? solid heat formed rear sway bar.
  • Increased spindle height by 1/2? via tall upper ball joints for improved camber gain and a better contact patch. Works nicely in conjunction with lowering springs.
  • Key Features:
  • Lower a-arms feature UMI-built Delrin bushings and accept standard springs or coilovers.
  • Rear trailing arms feature Poly and Roto-Joints as well as adjustable uppers for setting pinion angle and rear lateral location.
  • Roto-Joints allow smooth articulation for improved handling and less bind.
  • Springs: Springs intended for small block engine. Lightweight LS may require trimming and an additional 1/4 front end drop may occur with a full weight big block.
  • UMI shocks feature monotube construction and designed & tuned for optimum ride quality combined with responsive handling.
  • UMI springs feature ultra premium CrSi material with linear rates front and rear for consistent handling. (600 lb/in front, 130 lb/in rear)..
  • UMI?s Stage 3 Handling Kit Includes:
  • UMI?s Stage 3 kit is designed to achieve great street manners combined with Pro-Touring handling capability. In this newest revision we?ve refined our parts list to provide the most common options in one convenient package. Simply click and enjoy the performance. Up front you?ll find Delrin lower a-arm bushings for precise steering along with ?? taller upper ball joints to plant that tires contact patch. Out back we include our popular Roto-Joints and an adjustable length upper control arm so the axle can articulate nicely after you?ve perfected the driveline angle. Sway bars are UMI?s tried and true 1-1/4? front and 1? rear for a great front to rear handling balance. UMI?s new monotube gas shocks help to control the new premium lowering springs. The Stage 3 kit is available in beautiful red or black powder coat and is 100% designed, tested, manufactured and raced out of our shop in Philipsburg, PA ? USA.
  • Upper a-arms add caster for improved steering feel and straight line stability.

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UMI Performance

UMI Performance was founded in 2002 as a father/son business developing performance parts for GM and Ford products. They quickly began to focus on suspension upgrades for both older and late model muscle cars, and have become a leader in replacement and high-performance suspension components, from individual parts to entire kits.

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